initial buildroot for linux 5.15

package/odroidc2-firmware/Config.in

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+config BR2_PACKAGE_ODROIDC2_FIRMWARE
+	bool "odroidc2-firmware"
+	help
+	  This package extracts from
+	  https://github.com/hardkernel/u-boot/tree/odroidc2-v2015.01
+	  the pre-built firmware files, as well as the host tool
+	  fip_create that are needed to create bootable images for the
+	  Odroid C2 platform. See doc/board/amlogic/odroid-c2.rst in
+	  upstream U-Boot for more details.
+
+	  https://github.com/hardkernel/u-boot/tree/odroidc2-v2015.01

package/odroidc2-firmware/odroidc2-firmware.hash

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+# Locally calculated
+sha256  a2fba4c6d9332ecc5f04283f370d5c275f35d6cb62dba1f685d011269bacb6d0  odroidc2-firmware-s905_6.0.1_v5.5.tar.gz

package/odroidc2-firmware/odroidc2-firmware.mk

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+################################################################################
+#
+# odroidc2-firmware
+#
+################################################################################
+
+ODROIDC2_FIRMWARE_VERSION = s905_6.0.1_v5.5
+ODROIDC2_FIRMWARE_SITE = $(call github,hardkernel,u-boot,$(ODROIDC2_FIRMWARE_VERSION))
+ODROIDC2_FIRMWARE_INSTALL_IMAGES = YES
+
+define ODROIDC2_FIRMWARE_BUILD_CMDS
+	$(HOST_MAKE_ENV) $(MAKE) $(HOST_CONFIGURE_OPTS) \
+		-C $(@D)/tools/fip_create/
+endef
+
+ODROIDC2_FIRMWARE_FILES = \
+	fip/gxb/bl301.bin \
+	fip/gxb/bl30.bin \
+	fip/gxb/bl31.bin \
+	fip/gxb/bl2.package \
+	sd_fuse/bl1.bin.hardkernel
+
+define ODROIDC2_FIRMWARE_INSTALL_IMAGES_CMDS
+	$(foreach f,$(ODROIDC2_FIRMWARE_FILES), \
+		$(INSTALL) -D -m 0644 $(@D)/$(f) $(BINARIES_DIR)/$(notdir $(f))
+	)
+	$(INSTALL) -D -m0755 $(@D)/tools/fip_create/fip_create \
+		$(HOST_DIR)/bin/fip_create
+endef
+
+$(eval $(generic-package))